About these items: Perfect Fit: The cylinder head assembly replaces the original head to resolve failures and damage in various engine models. It fits small block Chevrolet (SBC 327/350/383 Corvette, Camaro, Z06), (SBF GT40/289/302/351W Mustang), and Chevrolet/GMC vehicles from the 90s and early 2000s, ensuring smooth engine operation. Precision Machining: Each cylinder head is CNC precision-machined for the combustion chamber, intake, and exhaust passages, ensuring smooth airflow and excellent sealing compared to standard castings. This also guarantees proper positioning, sizing, and angling of components like valves. Durable Materials: Crafted from high-quality aluminum A356 (for Chevrolet and models) or cast iron (for Chevrolet GMC V8 models), these cylinder heads offer excellent wear and heat resistance, enhancing engine lifespan and preventing deformation. Fully Assembled: Each cylinder head comes fully assembled with necessary components, including valve spring seats, springs, locks, seals, intake valves, and exhaust valves. This reduces the likelihood of installation errors and simplifies the setup process. Engine Performance Upgrade: Replacing old or damaged cylinder heads can significantly improve horsepower, fuel efficiency, and emissions. Ideal for addressing common issues like vibrations, oil leaks, or excessive spark plug oil deposits. Key Differences: Vehicle Compatibility: The first cylinder head is compatible with small block Chevrolet engines (SBC 327/350/383), while the second is designed for small block (GT40/289/302/351W) engines. The third fits a wide range of Chevrolet/GMC models from the late 90s and early 2000s. Material: The first and second models are made from aluminum A356, while the third uses high-strength cast iron, suitable for high-temperature environments. Spark Plug Hole Type: The first two cylinder heads are compatible with slant hole spark plugs, while the third is designed for straight hole spark plugs. Weight: The first two cylinder heads are lighter (26.9 lbs and 26.0 lbs) compared to the heavier third model (47.2 lbs), designed for the Chevrolet/GMC 5.7L V8 engine. Specifications: Model: 129006601 (Chevrolet SBC) / 129011601 ( SBF) / 129008006 (Chevrolet GMC) Combustion Chamber Volume: 64 cc (Chevrolet SBC) / 61 cc ( SBF) / 64 cc (Chevrolet GMC) Intake Port Volume: 190 cc (Chevrolet SBC) / 175 cc ( SBF) / 170 cc (Chevrolet GMC) Intake Valve Diameter: 2.0 inch / 51.3 mm (Chevrolet SBC and SBF) / 1.94 inch / 49.3 mm (Chevrolet GMC) Exhaust Valve Diameter: 1.60 inch / 40.6 mm (Chevrolet SBC and SBF) / 1.50 inch / 38.1 mm (Chevrolet GMC) Spark Plug Type: Slant Hole (Chevrolet SBC and SBF) / Straight Hole (Chevrolet GMC) Spark Plug Installation Hole: M14P1.2522.8 (Chevrolet SBC and SBF) / M14P1.2522.8 (Chevrolet GMC) Water Passage Sealing Side Leakage Pressure Range: 0.35-0.45 MPa (Chevrolet SBC and SBF) / 0.5-0.6 MPa (Chevrolet GMC) Main Material: Aluminum A356 (Chevrolet SBC and SBF) / Cast Iron (Chevrolet GMC) Product Weight: 26.9 lbs / 12.2 kg (Chevrolet SBC) / 26.0 lbs / 11.8 kg ( SBF) / 47.2 lbs / 21.4 kg (Chevrolet GMC) Product Dimensions: 19.7x7.5x5.1 inch / 500x190x130 mm (Chevrolet SBC) / 19.7x7.2x5.3 inch / 500x183x133.6 mm ( SBF) / 19.7x7.7x5 inch / 500x195x127 mm (Chevrolet GMC) Package Contents: 1 x Engine Cylinder Head 4 x Valve Installation Gaskets (Chevrolet SBC) 8 x Bolts (Chevrolet SBC) 1 x Instruction Manual (for all models)
| Material | Aluminum |
| Color | Aluminum, Compatible With Small Block Engines |
| SKU | sq25022522448189960 |
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